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48 Best ThreatDown Email Security Alternatives & Competitors (2026) | CybersecTools

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ThreatDown Email Security

Best ThreatDown Email Security Alternatives & Competitors in 2026

Top picks: Microsoft Defender for Office 365, INKY Behavioral Email Security Platform, Sophos Email — plus 45 more compared.

Email & Messaging Security

Evaluating ThreatDown Email Security alternatives comes down to matching Email & Messaging Security capabilities to your environment, integrations, and budget rather than chasing feature parity. The options below are compared on what actually drives a switch: coverage, deployment fit, pricing, and real reviews from security teams. Independent and vendor-neutral: we never sell rankings.

ThreatDown Email Security Alternatives and Competitors

ThreatDown Email Security is a commercial Email Security Platforms tool developed by ThreatDown by Malwarebytes. Security professionals most commonly compare it with Microsoft Defender for Office 365, INKY Behavioral Email Security Platform, Sophos Email, GreatHorn Email Security, and Trustifi AI Powered Email Security. All 48 alternatives are matched by shared capabilities, tags, and NIST CSF 2.0 coverage.

Data verified Jul 2026

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Top ThreatDown Email Security Alternatives and Competitors at a Glance

A closer look at the 8 most relevant alternatives and competitors to ThreatDown Email Security, including their key features and shared capabilities.

Microsoft Defender for Office 365

Commercial

Email Security Platforms

Email and collaboration security for Microsoft 365 environments

Key features: AI-powered sentiment analysis for email filtering, Inline protection against malicious links and attachments in Outlook and Teams, Real-time detonation of attachments and links, Automated BEC attack disruption with user disabling and device isolation, Post-delivery removal of malicious emails

View Microsoft Defender for Office 365|Microsoft Defender for Office 365 alternatives|Compare Microsoft Defender for Office 365

INKY Behavioral Email Security Platform

Commercial

Email Security Platforms

Behavioral email security platform protecting inbound, outbound, and internal mail

Key features: Inbound mail protection, Outbound mail protection, Internal mail protection, Advanced attachment analysis, Email encryption

View INKY Behavioral Email Security Platform|INKY Behavioral Email Security Platform alternatives|Compare INKY Behavioral Email Security Platform

Commercial

Email Security Platforms

Email security platform with phishing/BEC protection and MDR/XDR integration

Key features: Multi-layered defense with 20+ AI/ML models including NLP, Phishing and BEC attack protection, Email filtering and advanced threat detection, Sender authentication (SPF, DKIM, DMARC), URL protection and cloud sandboxing

View Sophos Email|Sophos Email alternatives|Compare Sophos Email

GreatHorn Email Security

Commercial

Email Security Platforms

Cloud-native email security platform for phishing detection and response

Key features: Phishing and BEC detection using ML/AI, Automated threat remediation, Smart banners for user education, Report Phish button, Pre-analysis threat detection before inbox delivery

View GreatHorn Email Security|GreatHorn Email Security alternatives|Compare GreatHorn Email Security

Trustifi AI Powered Email Security

Commercial

Email Security Platforms

AI-powered email security platform for threat detection and compliance

Key features: AI-powered inbound email threat detection and filtering, URL and file attachment scanning, Outbound email DLP with 256-bit AES encryption, Account takeover protection with behavioral analysis, Email archiving with eDiscovery and smart indexing

View Trustifi AI Powered Email Security|Trustifi AI Powered Email Security alternatives|Compare Trustifi AI Powered Email Security

Proofpoint Threat Protection

Commercial

Email Security Platforms

Email security platform with AI-based threat detection and DLP capabilities

Key features: AI-based email threat detection and prevention, Phishing and business email compromise protection, Adaptive email DLP with machine learning, Email encryption with policy-based controls, Account takeover protection

View Proofpoint Threat Protection|Proofpoint Threat Protection alternatives|Compare Proofpoint Threat Protection

Broadcom Symantec Email Security

Commercial

Email Security Platforms

Enterprise email security platform for cloud and on-premise deployments

Key features: Multilayered defense against ransomware, spear phishing, and BEC attacks, Cloud-based and on-premises deployment options, Cloud-based sandboxing for advanced threat detection, Click-time URL protection, Office 365 clawback and remediation

View Broadcom Symantec Email Security|Broadcom Symantec Email Security alternatives|Compare Broadcom Symantec Email Security

KnowBe4 Cloud Email Security

Commercial

Email Security Platforms

AI-driven email security platform for Microsoft 365 inbound/outbound threats

Key features: AI-driven detection of phishing, ransomware, and business email compromise, Behavioral AI and self-learning threat models, Real-time outbound email monitoring and data loss prevention, User alerts for accidental sends and misdirected emails, Policy-based email encryption

View KnowBe4 Cloud Email Security|KnowBe4 Cloud Email Security alternatives|Compare KnowBe4 Cloud Email Security

All 48 Alternatives & Competitors to ThreatDown Email Security

Compare

Microsoft Defender for Office 365

Email and collaboration security for Microsoft 365 environments

Email Security Platforms

Compare

INKY Behavioral Email Security Platform

Behavioral email security platform protecting inbound, outbound, and internal mail

Email Security Platforms

Compare

Email security platform with phishing/BEC protection and MDR/XDR integration

Email Security Platforms

Compare

GreatHorn Email Security

Cloud-native email security platform for phishing detection and response

Email Security Platforms

Compare

Trustifi AI Powered Email Security

AI-powered email security platform for threat detection and compliance

Email Security Platforms

Compare

Proofpoint Threat Protection

Email security platform with AI-based threat detection and DLP capabilities

Email Security Platforms

Compare

Broadcom Symantec Email Security

Enterprise email security platform for cloud and on-premise deployments

Email Security Platforms

Compare

KnowBe4 Cloud Email Security

AI-driven email security platform for Microsoft 365 inbound/outbound threats

Email Security Platforms

Compare

ConnectWise Email Security

Email security platform with AI threat detection, BEC protection, and DLP

Email Security Platforms

Compare

ID Agent Graphus

AI-powered anti-phishing platform for Microsoft 365 & Google Workspace.

Email Security Platforms

Compare

Infonaligy Proofpoint Email Security

Managed Proofpoint email security service for phishing & BEC protection.

Email Security Platforms

Compare

Unified AI-powered cybersecurity & cyber insurance platform for SMBs.

Email Security Platforms

Compare

AI-Powered Email Security & DMARC Protection

AI-powered DMARC monitoring and email authentication security platform

Email Security Platforms

Compare

Cisco Secure Email Threat Defense

Email threat protection for Microsoft 365 with advanced detection capabilities

Email Security Platforms

Compare

DMARC monitoring platform protecting domains from spoofing and BEC attacks.

Email Security Platforms

Compare

Fortinet FortiMail Email Security

AI-powered email security platform protecting against phishing, BEC, and ATO

Email Security Platforms

Compare

Cloudflare Cloud Email Security

Cloudflare Cloud Email Security is a cloud-based email protection service that safeguards organizations against phishing, malware, spam, and other email-borne threats through integrated threat detection and prevention capabilities.

Email Security Platforms

Compare

Cellopoint Cloud Email Security Solution

Cloud-based email security platform protecting against phishing, ransomware, BEC

Email Security Platforms

Compare

SorbSecurity Cloud Email Security

Cloud-based email security platform protecting against phishing & ransomware

Email Security Platforms

Compare

Mimecast Advanced Email Security

Email security platform protecting M365 & Google Workspace from threats

Email Security Platforms

Compare

Zivver Secure Business Email

All-in-one email security platform for threat protection and compliance

Email Security Platforms

Compare

MX Layer Email Security

Cloud-based email security platform with AI-powered threat detection

Email Security Platforms

Compare

xorlab Email Security

AI-driven email security platform for detecting advanced email threats

Email Security Platforms

Compare

Trend Micro Trend Vision One™

AI-powered email and collaboration security platform for threat detection

Email Security Platforms

Compare

AnubisNetworks Email Security

Email security platform protecting against fraud, malware, and spam threats

Email Security Platforms

Compare

Abnormal AI Security Mailbox

AI-powered email security operations platform for automated threat triage

Email Security Platforms

Compare

ESET Cloud Office Security

Cloud email security for Microsoft 365 and Google Workspace applications

Email Security Platforms

Compare

Material Security Email Security

Cloud workspace security platform for email, files, and account protection

Email Security Platforms

Compare

Bitdefender GravityZone Extended Email Security

Cloud-native email security platform with SEG and API-based protection

Email Security Platforms

Compare

Comodo Secure Email Gateway

Cloud-based email gateway with spam filtering, anti-phishing, and containment

Email Security Platforms

Compare

Darktrace Email Security

AI-powered email security platform detecting threats across email and messaging

Email Security Platforms

Compare

OPSWAT MetaDefender Email Security

Email security platform protecting against phishing, malware, and exploits

Email Security Platforms

Compare

TitanHQ Cybersecurity Bundles

Bundled cybersecurity solutions for MSPs and end users with email protection

Email Security Platforms

Compare

VIPRE Integrated Email Security (IES)

Email security platform for Microsoft 365 with AI-based threat detection

Email Security Platforms

Compare

Egress Intelligent Email Security

Cloud email security platform for inbound/outbound threat detection & DLP

Email Security Platforms

Compare

API-based email security platform for Microsoft 365 environments

Email Security Platforms

Compare

Cybersentriq MX Email Threat Protection

MX-based email security platform using AI to block spam, phishing & malware

Email Security Platforms

Compare

IRONSCALES Adaptive AI Email Security

AI-powered email security platform with behavioral detection and automation

Email Security Platforms

Compare

SpamExperts Incoming Email Filtering

Email filtering service protecting against spam, viruses, and phishing.

Email Security Platforms

Compare

Vircom Email Security

Email security platform enhanced with multi-tenant mgmt & automation tools

Email Security Platforms

Compare

Mailinblack U-Cyber 360°

Comprehensive email security & human risk mgmt platform with AI-powered protection

Email Security Platforms

Compare

Strongest Layer

AI-native email security platform detecting phishing and BEC attacks

Email Security Platforms

Compare

GLIMPS Email Security for M365

AI-based email security for M365 with phishing, BEC & malware detection.

Email Security Platforms

Compare

Cloud-based anti-spam and antivirus email filtering with AI threat detection.

Email Security Platforms

Compare

Cloud-native AI email security platform with LLM-based threat detection and DLP.

Email Security Platforms

Compare

Ocean Agentic Email Security Platform

Agentic AI email security platform that investigates emails pre-delivery.

Email Security Platforms

Compare

MDaemon Technologies SecurityGateway

Email security gateway protecting against spam, phishing, viruses & data leaks

Email Security Platforms

Compare

Email security gateway protecting against phishing, BEC, and email-borne threats

Email Security Platforms

Also compare alternatives to:

Microsoft Defender for Office 365 alternatives INKY Behavioral Email Security Platform alternatives Sophos Email alternatives GreatHorn Email Security alternatives Trustifi AI Powered Email Security alternatives Proofpoint Threat Protection alternatives Broadcom Symantec Email Security alternatives KnowBe4 Cloud Email Security alternatives ConnectWise Email Security alternatives ID Agent Graphus alternatives Infonaligy Proofpoint Email Security alternatives Upfort alternatives

Compare ThreatDown Email Security with:

ThreatDown Email Security vs Microsoft Defender for Office 365 ThreatDown Email Security vs INKY Behavioral Email Security Platform ThreatDown Email Security vs Sophos Email ThreatDown Email Security vs GreatHorn Email Security ThreatDown Email Security vs Trustifi AI Powered Email Security ThreatDown Email Security vs Proofpoint Threat Protection ThreatDown Email Security vs Broadcom Symantec Email Security ThreatDown Email Security vs KnowBe4 Cloud Email Security

ThreatDown Email Security Alternatives FAQ

Common questions security professionals ask when evaluating alternatives and competitors to ThreatDown Email Security.

What are the best alternatives to ThreatDown Email Security?

The most popular alternatives to ThreatDown Email Security include Microsoft Defender for Office 365, INKY Behavioral Email Security Platform, Sophos Email, GreatHorn Email Security, and Trustifi AI Powered Email Security. These Email Security Platforms tools offer similar capabilities and are frequently compared by security professionals evaluating their options.

How many alternatives to ThreatDown Email Security are available?

There are 48 alternatives to ThreatDown Email Security listed on CybersecTools, all within the Email Security Platforms category. Each alternative is matched based on shared capabilities, tags, and NIST CSF coverage areas.

Is ThreatDown Email Security free or commercial?

ThreatDown Email Security is a commercial Email Security Platforms tool. It requires a paid license or subscription. Both free and commercial alternatives are available for comparison.

What type of tool is ThreatDown Email Security?

ThreatDown Email Security is a Email Security Platforms tool within the broader Email & Messaging Security category. It is used by security professionals for email security platforms capabilities and can be compared against 48 similar tools.

Have more questions? Browse our categories or search for specific tools.

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